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Groups > comp.lang.postscript > #2753 > unrolled thread

a smooth curve through given points ?

Started byPeter Billam <peter@www.pjb.com.au>
First post2016-08-12 08:10 +0000
Last post2016-11-05 10:12 -0700
Articles 9 on this page of 29 — 9 participants

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  a smooth curve through given points ? Peter Billam <peter@www.pjb.com.au> - 2016-08-12 08:10 +0000
    Re: a smooth curve through given points ? Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-08-12 01:12 -0700
    Re: a smooth curve through given points ? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2016-08-12 21:59 -0400
      Re: a smooth curve through given points ? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2016-08-13 22:42 -0400
    Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-12 21:49 -0700
      Re: a smooth curve through given points ? Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-08-12 21:59 -0700
        Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-12 22:21 -0700
        Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-18 15:01 -0700
          Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-19 13:10 -0700
            Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-19 13:13 -0700
      Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-12 22:00 -0700
      Re: a smooth curve through given points ? Peter Billam <peter@www.pjb.com.au> - 2016-08-13 09:44 +0000
        Re: a smooth curve through given points ? Peter Billam <peter@www.pjb.com.au> - 2016-08-15 01:00 +0000
          Re: a smooth curve through given points ? John Forkosh <forkosh@panix.com> - 2016-08-15 03:08 +0000
            Re: a smooth curve through given points ? Peter Billam <peter@www.pjb.com.au> - 2016-08-15 09:36 +0000
              Re: a smooth curve through given points ? JohnF <john@please.see.sig.for.email.com> - 2016-08-16 01:28 +0000
                Re: a smooth curve through given points ? Peter Billam <peter@www.pjb.com.au> - 2016-08-16 23:32 +0000
                  Re: a smooth curve through given points ? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2016-08-17 01:07 -0400
      Re: a smooth curve through given points ? JohnF <john@please.see.sig.for.email.com> - 2016-08-14 06:17 +0000
    Re: a smooth curve through given points ? jdaw1 <jdawiseman@gmail.com> - 2016-08-16 03:14 -0700
    Re: a smooth curve through given points ? Alan <alan.isaac@gmail.com> - 2016-08-18 14:42 -0700
      Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-18 15:19 -0700
        Re: a smooth curve through given points ? Alan <alan.isaac@gmail.com> - 2016-08-18 18:52 -0700
          Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-18 21:47 -0700
            Re: a smooth curve through given points ? Alan <alan.isaac@gmail.com> - 2016-08-19 06:01 -0700
              Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-08-19 14:06 -0700
    Re: a smooth curve through given points ? luser droog <luser.droog@gmail.com> - 2016-11-03 22:03 -0700
      Re: a smooth curve through given points ? JohnF <john@please.see.sig.for.email.com> - 2016-11-05 05:19 +0000
      Re: a smooth curve through given points ? don lancaster <don@tinaja.com> - 2016-11-05 10:12 -0700

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#2780

FromAlan <alan.isaac@gmail.com>
Date2016-08-18 14:42 -0700
Message-ID<8490df29-39b2-48f0-991f-d7cf0bc9ca60@googlegroups.com>
In reply to#2753
I'm late to this discussion, which seems to have gone beyond Casselman's discussion, but it may still be useful.
http://www.math.ubc.ca/~cass/graphics/manual/pdf/ch6.pdf

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#2782

Fromluser droog <luser.droog@gmail.com>
Date2016-08-18 15:19 -0700
Message-ID<59800f55-03ee-45ff-a964-509b60e37ce4@googlegroups.com>
In reply to#2780
On Thursday, August 18, 2016 at 4:42:07 PM UTC-5, Alan wrote:
> I'm late to this discussion, which seems to have gone beyond Casselman's discussion, but it may still be useful.
> http://www.math.ubc.ca/~cass/graphics/manual/pdf/ch6.pdf

Good stuff there. But somebody should tell him about

  {currentpoint pop pop}stopped not

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#2783

FromAlan <alan.isaac@gmail.com>
Date2016-08-18 18:52 -0700
Message-ID<8aacdb10-37a0-4f3c-a404-27dd8aecfbdc@googlegroups.com>
In reply to#2782
On Thursday, August 18, 2016 at 6:19:40 PM UTC-4, luser droog wrote:
> Good stuff there. But somebody should tell him about
>   {currentpoint pop pop}stopped not


Sorry to ask about basics, but I'm still getting started with PostScript.  I assume the idea here is to determine whether a current point exists, right?  What do you want Casselman to use this for?

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#2784

Fromluser droog <luser.droog@gmail.com>
Date2016-08-18 21:47 -0700
Message-ID<bb87a90e-34cf-4966-9140-464862b14bc7@googlegroups.com>
In reply to#2783
On Thursday, August 18, 2016 at 8:52:49 PM UTC-5, Alan wrote:
> On Thursday, August 18, 2016 at 6:19:40 PM UTC-4, luser droog wrote:
> > Good stuff there. But somebody should tell him about
> >   {currentpoint pop pop}stopped not
> 
> 
> Sorry to ask about basics, but I'm still getting started with PostScript.  I assume the idea here is to determine whether a current point exists, right?  What do you want Casselman to use this for?

He uses `pathforall` which works but is much more heavy
weight. At one point, either in the pdf or the printed
version (I forget which), he laments that there isn't
a simpler way to do it. `stopped` is the simpler way
that he was looking for (IMO).

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#2785

FromAlan <alan.isaac@gmail.com>
Date2016-08-19 06:01 -0700
Message-ID<94b6376d-d328-4605-bd18-f573190ef63d@googlegroups.com>
In reply to#2784
On Friday, August 19, 2016 at 12:47:56 AM UTC-4, luser droog wrote:
> He uses `pathforall` which works but is much more heavy
> weight. At one point, either in the pdf or the printed
> version (I forget which), he laments that there isn't
> a simpler way to do it. `stopped` is the simpler way
> that he was looking for (IMO).


Oh I see, his `thereisacurrentpoint` proc in section 6.11.
Yes, I agree. Thanks.

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#2788

Fromluser droog <luser.droog@gmail.com>
Date2016-08-19 14:06 -0700
Message-ID<32fc0eb8-828c-4c81-8d26-bb0351176b6d@googlegroups.com>
In reply to#2785
On Friday, August 19, 2016 at 8:01:44 AM UTC-5, Alan wrote:
> On Friday, August 19, 2016 at 12:47:56 AM UTC-4, luser droog wrote:
> > He uses `pathforall` which works but is much more heavy
> > weight. At one point, either in the pdf or the printed
> > version (I forget which), he laments that there isn't
> > a simpler way to do it. `stopped` is the simpler way
> > that he was looking for (IMO).
> 
> 
> Oh I see, his `thereisacurrentpoint` proc in section 6.11.
> Yes, I agree. Thanks.

Awesome. And don't hold back with the "basic" questions.
We love this stuff!

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#2927

Fromluser droog <luser.droog@gmail.com>
Date2016-11-03 22:03 -0700
Message-ID<c51e1e94-adf8-44e1-a6a6-97891d7aac23@googlegroups.com>
In reply to#2753
On Friday, August 12, 2016 at 3:10:09 AM UTC-5, Peter Billam wrote:
> Hi.  There must be reasonable ways of constructing a series
> of curveto's that go smoothly through a given array of points
> [x1 y1 x2 y2 ... xN yN] ...  Anyone here written stuff like that,
> or know of where it could be found ?
> 

Tons of info, including a draft of a book on the topic,
available in this sad thread:
https://groups.google.com/d/topic/comp.graphics.algorithms/COXe4tAPMC0/discussion

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#2928

FromJohnF <john@please.see.sig.for.email.com>
Date2016-11-05 05:19 +0000
Message-ID<nvjq5s$ajk$1@reader2.panix.com>
In reply to#2927
luser droog <luser.droog@gmail.com> wrote:
> On Friday, August 12, 2016 at 3:10:09 AM UTC-5, Peter Billam wrote:
>> Hi.  There must be reasonable ways of constructing a series
>> of curveto's that go smoothly through a given array of points
>> [x1 y1 x2 y2 ... xN yN] ...  Anyone here written stuff like that,
>> or know of where it could be found ?
>> 
> 
> Tons of info, including a draft of a book on the topic,
> available in this sad thread:
> https://groups.google.com/d/topic/comp.graphics.algorithms/COXe4tAPMC0/discussion

Thanks for the link. The only two links there that seem to still be
live are the direct links to the book's manuscript and appendix pdf's

https://web.archive.org/web/20141019101044/http://k9dci.home.comcast.net/~k9dci/Book/Manuscript_Ver_9b.pdf

and

https://web.archive.org/web/20151001192625/http://k9dci.home.comcast.net/~k9dci/Book/Appendix_Ver_8b.pdf

-- 
John Forkosh  ( mailto:  j@f.com  where j=john and f=forkosh )

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#2929

Fromdon lancaster <don@tinaja.com>
Date2016-11-05 10:12 -0700
Message-ID<9349c380-2678-8c6a-deec-016e60102407@tinaja.com>
In reply to#2927
On 11/3/2016 10:03 PM, luser droog wrote:
> On Friday, August 12, 2016 at 3:10:09 AM UTC-5, Peter Billam wrote:
>> Hi.  There must be reasonable ways of constructing a series
>> of curveto's that go smoothly through a given array of points


http://www.tinaja.com/bcsamp1.shtml of course.


-- 
Many thanks,

Don Lancaster                          voice phone: (928)428-4073
Synergetics   3860 West First Street   Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml   email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com

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